Periodic Video of Speculum

Prof. Martyn Poliakoff has made a video showing Isaac Newton’s first telescope, which is kept at the Royal Society, in London. As we learned in physics, Isaac Newton used a mirror in his telescope to minimise chromatic aberrations which can occur when using lenses. The mirror was therefore a critical part of the telescope, a special alloy of one-third tin and two-thirds copper and a small amount of arsenic was used, called Speculum.

Advertisements

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s

%d bloggers like this: